Simulated trawling: Exhaustive swimming followed by extreme crowding as contributing reasons to variable fillet quality in trawl-caught Atlantic cod (Gadus morhua).
Trawl-caught Atlantic cod (Gadus morhua) often yield highly variable fillet quality that may be related to capture stress. To investigate mechanisms involved in causing variable quality, commercial-sized (3.5±0.9 kg) Atlantic cod were swum to exhaustion in a large swim tunnel and subsequently expose...
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ftdoajarticles:oai:doaj.org/article:f400e49e3da3431ba9823dca8008d224 2023-05-15T15:26:53+02:00 Simulated trawling: Exhaustive swimming followed by extreme crowding as contributing reasons to variable fillet quality in trawl-caught Atlantic cod (Gadus morhua). Ragnhild Aven Svalheim Øyvind Aas-Hansen Karsten Heia Anders Karlsson-Drangsholt Stein Harris Olsen Helge Kreutzer Johnsen 2020-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0234059 https://doaj.org/article/f400e49e3da3431ba9823dca8008d224 EN eng Public Library of Science (PLoS) https://doi.org/10.1371/journal.pone.0234059 https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0234059 https://doaj.org/article/f400e49e3da3431ba9823dca8008d224 PLoS ONE, Vol 15, Iss 6, p e0234059 (2020) Medicine R Science Q article 2020 ftdoajarticles https://doi.org/10.1371/journal.pone.0234059 2022-12-31T05:57:38Z Trawl-caught Atlantic cod (Gadus morhua) often yield highly variable fillet quality that may be related to capture stress. To investigate mechanisms involved in causing variable quality, commercial-sized (3.5±0.9 kg) Atlantic cod were swum to exhaustion in a large swim tunnel and subsequently exposed to extreme crowding (736±50 kg m-3) for 0, 1 or 3 hours in an experimental cod-end. The fish were then recuperated for 0, 3 or 6 hours in a net pen prior to slaughter to assess the possibility to reverse the reduced fillet quality. We found that exhaustive swimming and crowding were associated with increased metabolic stress, as indicated by increased plasma cortisol, blood lactate and blood haematocrit levels, accompanied by reduced quality of the fillets due to increased visual redness and lower initial muscle pH. The observed negative effects of exhaustive swimming and crowding were only to a small degree reversed within 6 hours of recuperation. The results from this study suggest that exhaustive swimming followed by extreme crowding can reduce fillet quality, as measured by fillet redness and muscle pH, and contribute to the variable fillet quality seen in trawl-caught Atlantic cod. Recuperation for more than six hours may be required to reverse these effects. Article in Journal/Newspaper atlantic cod Gadus morhua Directory of Open Access Journals: DOAJ Articles Slaughter ENVELOPE(-85.633,-85.633,-78.617,-78.617) PLOS ONE 15 6 e0234059 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q Ragnhild Aven Svalheim Øyvind Aas-Hansen Karsten Heia Anders Karlsson-Drangsholt Stein Harris Olsen Helge Kreutzer Johnsen Simulated trawling: Exhaustive swimming followed by extreme crowding as contributing reasons to variable fillet quality in trawl-caught Atlantic cod (Gadus morhua). |
topic_facet |
Medicine R Science Q |
description |
Trawl-caught Atlantic cod (Gadus morhua) often yield highly variable fillet quality that may be related to capture stress. To investigate mechanisms involved in causing variable quality, commercial-sized (3.5±0.9 kg) Atlantic cod were swum to exhaustion in a large swim tunnel and subsequently exposed to extreme crowding (736±50 kg m-3) for 0, 1 or 3 hours in an experimental cod-end. The fish were then recuperated for 0, 3 or 6 hours in a net pen prior to slaughter to assess the possibility to reverse the reduced fillet quality. We found that exhaustive swimming and crowding were associated with increased metabolic stress, as indicated by increased plasma cortisol, blood lactate and blood haematocrit levels, accompanied by reduced quality of the fillets due to increased visual redness and lower initial muscle pH. The observed negative effects of exhaustive swimming and crowding were only to a small degree reversed within 6 hours of recuperation. The results from this study suggest that exhaustive swimming followed by extreme crowding can reduce fillet quality, as measured by fillet redness and muscle pH, and contribute to the variable fillet quality seen in trawl-caught Atlantic cod. Recuperation for more than six hours may be required to reverse these effects. |
format |
Article in Journal/Newspaper |
author |
Ragnhild Aven Svalheim Øyvind Aas-Hansen Karsten Heia Anders Karlsson-Drangsholt Stein Harris Olsen Helge Kreutzer Johnsen |
author_facet |
Ragnhild Aven Svalheim Øyvind Aas-Hansen Karsten Heia Anders Karlsson-Drangsholt Stein Harris Olsen Helge Kreutzer Johnsen |
author_sort |
Ragnhild Aven Svalheim |
title |
Simulated trawling: Exhaustive swimming followed by extreme crowding as contributing reasons to variable fillet quality in trawl-caught Atlantic cod (Gadus morhua). |
title_short |
Simulated trawling: Exhaustive swimming followed by extreme crowding as contributing reasons to variable fillet quality in trawl-caught Atlantic cod (Gadus morhua). |
title_full |
Simulated trawling: Exhaustive swimming followed by extreme crowding as contributing reasons to variable fillet quality in trawl-caught Atlantic cod (Gadus morhua). |
title_fullStr |
Simulated trawling: Exhaustive swimming followed by extreme crowding as contributing reasons to variable fillet quality in trawl-caught Atlantic cod (Gadus morhua). |
title_full_unstemmed |
Simulated trawling: Exhaustive swimming followed by extreme crowding as contributing reasons to variable fillet quality in trawl-caught Atlantic cod (Gadus morhua). |
title_sort |
simulated trawling: exhaustive swimming followed by extreme crowding as contributing reasons to variable fillet quality in trawl-caught atlantic cod (gadus morhua). |
publisher |
Public Library of Science (PLoS) |
publishDate |
2020 |
url |
https://doi.org/10.1371/journal.pone.0234059 https://doaj.org/article/f400e49e3da3431ba9823dca8008d224 |
long_lat |
ENVELOPE(-85.633,-85.633,-78.617,-78.617) |
geographic |
Slaughter |
geographic_facet |
Slaughter |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
PLoS ONE, Vol 15, Iss 6, p e0234059 (2020) |
op_relation |
https://doi.org/10.1371/journal.pone.0234059 https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0234059 https://doaj.org/article/f400e49e3da3431ba9823dca8008d224 |
op_doi |
https://doi.org/10.1371/journal.pone.0234059 |
container_title |
PLOS ONE |
container_volume |
15 |
container_issue |
6 |
container_start_page |
e0234059 |
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1766357353053028352 |